my brand new power bank was with my friend to charge her phone before the 10 months lockdown.
now I got it back and it won't charge at all.
when I plug in the cable, only the one lid will blink all the time, but no energy is stored on the power bank.
I tried to use different cables and power sources but nothing worked.
I even tried to charge it overnight, but in the morning only that one lid was linking all the time, with no power stored on the portable charger.
What are the possibilities and causes for this to happen? and is there a way to fix it?